CVE-2017-3231: Infoleak
It was discovered that the URLClassLoader class in the Networking component of OpenJDK did not properly check access control context when downloading class files. An untrusted Java application or applet could use this flaw to make HTTP requests to locations that should not be accessible, bypassing certain Java sandbox restrictions.
Other sources
Vulnerability in the Java SE, Java SE Embedded component of Oracle Java SE (subcomponent: Networking). Supported versions that are affected are Java SE: 6u131, 7u121 and 8u112; Java SE Embedded: 8u111. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Java SE, Java SE Embedded accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS v3.0 Base Score 4.3 (Confidentiality impacts).
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/openjdk-8to a version that resolves this vulnerability.Fixed in 8u442-ga-2
Event History
Frequently Asked Questions
What is the severity of CVE-2017-3231?
CVE-2017-3231 is classified as a moderate severity vulnerability.
How do I fix CVE-2017-3231?
To remediate CVE-2017-3231, update to the latest version of OpenJDK or Oracle JDK that includes the fix, such as OpenJDK 8u442.
What did CVE-2017-3231 affect?
CVE-2017-3231 affects Oracle JDK and JRE versions 1.6 update 131, 1.7 update 121, and 1.8 updates 111 and 112.
What is the risk associated with CVE-2017-3231?
The risk of CVE-2017-3231 is that an untrusted Java application could exploit this vulnerability to bypass access controls and make unauthorized HTTP requests.
Who is impacted by CVE-2017-3231?
Developers and organizations using affected versions of Oracle JDK and JRE are impacted by CVE-2017-3231.